| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /* |
| * NAME |
| * read01.c |
| * |
| * DESCRIPTION |
| * Testcase to check if read returns the number of bytes read correctly. |
| * |
| * ALGORITHM |
| * Create a file and write some bytes out to it. |
| * Attempt to read more than written. |
| * Check the return count, and the read buffer. The read buffer should be |
| * same as the write buffer. |
| * |
| * USAGE: <for command-line> |
| * read01 [-c n] [-f] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -f : Turn off functionality Testing. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * RESTRICTIONS |
| * None |
| */ |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include "test.h" |
| #include "usctest.h" |
| |
| void cleanup(void); |
| void setup(void); |
| |
| char *TCID = "read01"; |
| int TST_TOTAL = 1; |
| extern int Tst_count; |
| |
| #define TST_SIZE 26 /* could also do strlen(palfa) */ |
| char fname[255]; |
| char palfa[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ; |
| int fild; |
| |
| main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| |
| int n; |
| int rfild; |
| char prbuf[BUFSIZ]; |
| |
| /* |
| * parse standard options |
| */ |
| if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){ |
| tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg); |
| /*NOTREACHED*/ |
| } |
| |
| setup(); /* global setup for test */ |
| |
| /* check looping state if -i option given */ |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| Tst_count = 0; /* reset Tst_count while looping */ |
| |
| if ((rfild = open(fname, O_RDONLY)) == -1) { |
| tst_brkm(TBROK, cleanup, "can't open for reading"); |
| /*NOTREACHED*/ |
| } |
| TEST(read(rfild, prbuf, BUFSIZ)); |
| |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL, "call failed unexpectedly"); |
| continue; |
| } |
| |
| if (STD_FUNCTIONAL_TEST) { |
| if (TEST_RETURN != TST_SIZE) { |
| tst_resm(TFAIL, "Bad read count - got %d - " |
| "expected %d", TEST_RETURN, TST_SIZE); |
| continue; |
| } |
| if (strcmp(palfa, prbuf) != 0) { |
| tst_resm(TFAIL, "read buffer not equal " |
| "to write buffer"); |
| continue; |
| } |
| tst_resm(TPASS, "functionality of read() is correct"); |
| } else { |
| tst_resm(TPASS, "call succeeded"); |
| } |
| if (close(rfild) == -1) { |
| tst_brkm(TBROK, cleanup, "close() failed"); |
| /*NOTREACHED*/ |
| } |
| } |
| cleanup(); |
| /*NOTREACHED*/ |
| } |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test |
| */ |
| void |
| setup(void) |
| { |
| /* capture signals */ |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| umask(0); |
| |
| /* Pause if that option was specified */ |
| TEST_PAUSE; |
| |
| /* make a temp directory and cd to it */ |
| tst_tmpdir(); |
| |
| sprintf(fname,"tfile_%d",getpid()); |
| |
| if ((fild = creat(fname, 0777)) == -1) { |
| tst_brkm(TBROK, cleanup, "creat(%s, 0777) Failed, errno = %d" |
| " : %s", fname, errno, strerror(errno)); |
| /*NOTREACHED*/ |
| } |
| if (write(fild, palfa, TST_SIZE) != TST_SIZE) { |
| tst_brkm(TBROK, cleanup, "can't write to Xread"); |
| /*NOTREACHED*/ |
| } |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at completion or |
| * premature exit. |
| */ |
| void |
| cleanup(void) |
| { |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| /* Remove tmp dir and all files in it */ |
| unlink(fname); |
| tst_rmdir(); |
| |
| /* exit with return code appropriate for results */ |
| tst_exit(); |
| } |